Do you think that political correctness will cause a backlash?

We all have our ways of doing things and of being, because of the place we were brought up, but nowadays we are taught to pretend that everyone is the same (political correctness) and if anyone dares to say different they are a racist. I don't want to be a racist, I like to treat everyone the way I want to be treated, I can also see that there are such things as national characteristics. Will we end up not being able to tell the difference between what is good and what is not because we've been taught to go against what we observe about people?